U1142 – BMW DTC

BMW DTC U1142 – Message Monitoring Throttle Actuator Alive Check (Bank 1)

DTC U1142 meaning on BMW

DTC U1142 on a BMW refers to the Message Monitoring Throttle Actuator Alive Check for Bank 1. This diagnostic trouble code indicates that there is an issue with the communication between the throttle actuator and the engine control module (ECM) on Bank 1 of the vehicle.

BMW DTC U1142 symptoms

Symptoms of DTC U1142 on a BMW may include:

• Engine stalling or hesitation
• Reduced engine power
• Check Engine Light (CEL) illuminated on the dashboard
• Difficulty accelerating

BMW DTC U1142 causes

Common causes of DTC U1142 on a BMW include:

• Faulty throttle actuator
• Wiring or connection issues between the throttle actuator and ECM
• ECM software or hardware problems

BMW DTC U1142 seriousness

DTC U1142 should be addressed promptly as it can lead to drivability issues and potential safety concerns. Ignoring this code may result in further damage to the vehicle and could lead to more expensive repairs down the line.

How to diagnose DTC U1142 on BMW

To diagnose DTC U1142 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the ECM
2. Inspect the wiring and connections between the throttle actuator and ECM for any damage or corrosion
3. Test the throttle actuator for proper operation
4. Check for any software updates available for the ECM

How to fix DTC U1142 on BMW

To fix DTC U1142 on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connections between the throttle actuator and ECM
2. Replace the throttle actuator if it is found to be faulty
3. Update the ECM software if necessary
4. Clear the fault codes and perform a test drive to ensure the issue has been resolved

How to erase DTC U1142 on BMW

To erase DTC U1142 on a BMW, a mechanic can use a diagnostic scanner to clear the fault codes stored in the ECM. Once the codes have been cleared, the mechanic should perform a test drive to verify that the issue has been resolved and that the Check Engine Light is no longer illuminated.

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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